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It has been reported that 80% of taxpayers who are audited by the Internal Revenue Service end up paying more money in taxes. Assume that auditors are randomly assigned to cases, and that one of the ways the IRS oversees its auditors is to monitor the percentage of cases that result in the taxpayer paying more taxes.
If a sample of 400 cases handled by an individual auditor has 77.0% of those she audited paying more taxes, is there reason to believe her overall "pay more" percentage might be some value other than 80%? Use the 0.10 level of significance in reaching a conclusion. Determine and interpret the p-value for the test.
The last sample showed a mean and standard deviation of 3.55 and 0.08 inches, respectively. Using α = 0.05, the appropriate decision is?
What fraction of cups will probably overflow if 230-milliliter cups are used for the next 1000 drinks? 0.0228 or 23 out of the 1000 drinks will overflow.
a production process is set to manufacture bolts with a diameter of .5 inches. the process has a standard deviation of
What is the probability the selected employee is a production worker? What is the probability the selected employee is either a production worker or a supervisor?
Use regression analysis to develop an estimated regression equation that could be used to predict the value score given the price of the car.
An n-dimensional Gaussian vector W has a block diagonal covariance matrix where CX is m × m, CY is (n - m) × (n - m). Show that W can be written in terms of component vectors X and Y in the form such that X and Y are independent Gaussian random ve..
Ohio Company provided the following information regarding its only product--ice skates.
Does the value 97.2% suggest that this is a good model? Explain.- Here's a scatterplot of the residuals. Now do you think this is a good model for these data? Explain?
A spinner has the numbers 1 thru 9. The spinner is spun once. What is the probability of P (3, 6 or 8)? Write the answer as a percent.
Make a histogram of the number of rolls the students in your class require to get their first Reggie Jackson poster.- Describe the shape of this distribution.
Give a 95% confidence interval for the difference between the mean weight of male mice and female mice using a statistical program.
Construction of confidence interval for difference between first and second sample mean revealed interval to be 10 plus or minus 12. We conclude.
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